Answer:
The answer is: A. X is a neutron and Y is an electron.
Step-by-step explanation:
The sub-atomic particles inside an atom are:
- Neutron: A particle with no charge. inside the nucleus of the atom.
- Proton: A particle with positive charge, inside the nucleus of the atom.
- Electron: A particle with negative charge, moving around the nucleus of the atom.
Since the particle X in the problem has no charge, this particle is a Neutron. And, as the particle Y is outside the nucleus, it has to be an electron. So the right answer is A.